Improvement in combination padlocks



catania;

GEORGE THOMPSON, OE TEEN TON, NEW JERSEY, ASSIGNOR TO HIMSELE AND JOHN H. OOGILL, OE SAME PLAGE,

Letters Patent No. 102,620, dated May 3, 1870.

The Schedule referred to in these Letters Patent; and. making part of the same.

A-op-M I, GEORGE THOMPSON, of Trenton, in the county of Mercer and State of New Jersey, have invented certain Improvements in Combination Padlocks, of

which the following is a specification, reference being the joint between the face-plate and the hub of theY outer tumbler.

-The same letters are used in all the figures in the designation of identical parts.

This invention relates to that class of combination padlocks which are constructed with a series-of tumblers, provided each with a gate or notch into which,

-as they are made to register with one another at a certain point, the bit ot' the bolt or dog ,recedes to release the hasp or shackle.

My improvements consist iu a peculiar construction of the end ot' the shackle and the hook onthe dog which retains it, together with a spring acting upon the dog, whereby it is made self-lockin To enable those skilled in the art to make and use my invention, I will vnew proceed to describe its construction and operation.

The case A may have the form clearly shown in fi g. 2, or any other adapted to receive the various partsto be attached to itV B B B represent a series of circular tumblers pivoted upon a central hub, a, of the case, so as to revolve freely thereon.

Each has a gate or notch, B', adapted to receive the bit of the dog, the one in the upper tumbler being beveledon one side, as shown in fig. 2, so as to enable it, on turning it in one direction, to push ont such dog.

The tumblers are separated from one another by washers, b', in the usual manner, and are also, upon theiry opposing faces, provided with studs, b, which engage with each other on turning such tumblers.

The upper tumbler has. a short circular hub, which` projects through the faceplate A', and is made iinsh with the outer surface thereof. When the two join, the face-plate is so constructed as to retain the point ofthe key, which can only enter under and be withdrawn from it at a recess, a', out in it at a point nearly opposite to that which'the point of lthe key must occupy in setting the last tumbler, so that, in

order to withdraw such key from the lock, it becomes necessary to turn it about a half revolution, which will, of course, break up the combination.

Various modes of constructing the joint between the face-plate and the hub of the tumbler are clearly Y indicated in figs. 3, 7, and 8.

A dial is engraved upon the face-plate, encircling the hub, and marked with letters, with reference to which the tumblers are arranged, so that on revolv.- ing the upper tumbler back and forth, stopping at certain marked points, all the tumblers can be so ar ranged that their notches register directly opposite the bit of the dog.

O represents the dog, which is pivoted upon a stud; c, in-such a manner as to permit of a slight movement in the direction of its axis.

' The thickness of this dog is somewhat less than the space between the face and rear'plates of the case A, and a spring, O, acts upon it to keep its'upper surface in contact with the face-plate The outer end of the dog is formedas clearly shown in figs. 2 and 4, it being provided on one side with a bit, O2, and upon the other' with a cutaway beveled projection or hook, C. l

D represents the hasp or shackle, pivoted to lugs ofthe case at al. Its outer end enters the casing, in locking, through a suitable opening for that purpose, and this end has such a thickness as to t snugly between the plates of such case.

It will be observed, by reference to figs. 21and 5, that a recess, d is cut in this end ofthe shackle, leaving only asmall projection, D', upon its outer end. This projection is beveled ,upon its under side, in a reverse direction to that ofl the beveled hook (l3 of the dog, so that, on pushing the shackle into thecase, this beveled projection D slides upon the beveled hook C, and, as it is pressed in further, it pushes the dog toward the rear plate until it has been slid entirely overthe hook, when the action ofthe spring Cl at once throws the dog up, causing its hook O3 to enter-the lrecess d in the shackle, and tov engage with its projection D', and to lock it.

E represents the key, to be formed substantially as shown in iig. 6, it having a straight edge where it comes in contact with the case, one Aend of which is suitably formed into a pointer.

At the opposite endit has a shank, E1, Awhich enters a socket in the hub a of the case.

Between this shank and the pointed end is th point E, the inner portion of which enters a small recess'iu the hub of the upper tumbler near its periphrecess, d', and eut-away beveled projection D', in` combination with the cut-away beveled hook O3 of the dog C, andv spring O1, substantially as and for the purpose vset forth. ,n GEO. THOMPSON.'

Witnesses:

RANDOLPH H. Moons,

R.V G. BELVILLE. 

